What haven't been banned in public places.
Motorcycle helmets
Face-masks for health reasons
Face-covering for sporting or professional activities
Sunglasses, hats etc which do not completely hide the face
Masks used in "traditional activities", such as carnivals or religious processions.
The above could all be regarded as security risks.
So if you are Muslim only you are not allowed the freedom that France regards as her prerogative.
I guess a few Muslim women may decide that wearing a motorcycling helmet will be a substitute.
Also if such a ban finds it's way here I hope we all go out and buy a burkha and wear it as a mass protest.